In an \({{S}_{{{N}^{1}}}}\) reaction on chiral centres, there is

A inversion more than retention leading to partial racemisation
B \(100\%\) retention
C \(100\%\) inversion
D \(100\% \) racemisation.

Verified Solution

Answer & Solution

Correct Answer

(A) inversion more than retention leading to partial racemisation

Step-by-step Solution

Detailed explanation

\({{S}_{{{N}^{1}}}}\) reaction gives racemic mixture with slight predominance of that isomer which corresponds to inversion because \({{S}_{{{N}^{1}}}}\) also depends upon the degree of'shielding' of the front side of the reacting carbon.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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